Kirkland Lake Gold stopped gold production to focus on exploration of the gold deposit.

ABC Rural: Daniel Fitzgerald

A Northern Territory gold mine which suspended production last year has found some of the NT's highest grade gold in its exploration.

At the time, the owners wanted to concentrate on exploration and work out how much gold was left in the mine.

Since June 2017 drill rigs at Kirkland Lake's Cosmo Gold mine, 160 kilometres south west of Darwin, have been working around the clock, and in that time have found some of the NT's highest grade gold results.

The Canadian-owned company is aiming to define the gold resource at Cosmo, with the hope of re-commencing gold production in the not-too-distant future.

ABC Rural was given access to the mine, one of only two underground mines in the NT, to check out the ongoing exploration.

This core sample yielded 1,577 grams per tonne over 0.35 metres, one of the highest grade finds at the Cosmo mine.

ABC Rural: Daniel Fitzgerald

Exploration finds some of highest grade gold in NT

Drilling results from Cosmo released by Kirkland Lake in December 2017 showed a significant expansion of the known gold deposit.

Intercepts in the drilling at the Lantern deposit showed one result of 1,624 grams per tonne over 0.91 metres, and another of 1,577 grams per tonne over 0.35 metres.

"They are some of the highest grades that have been recognised in our mines over the years," Mr Edwards said.

"Anything that is running in the thousands of grams [per tonne] shows it is significantly higher grades, they are over very small intervals, but it is very positive because of the grade tenure you can see."

"We have a resource here at the Lantern deposit of around 55,000 ounces of indicated material and just over 100,000 ounces of inferred material."

Kirkland Lake has created several new tunnels in its Cosmo mine to move exploration drill rigs into place.

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